Npgsql(PostgreSQL) 中的 LastInsertedId

Question

这对于 Postgresql 来说如何正确？ LastInsertedId 上的错误

int playerId = 0;
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
    try
    {
        connection.Open();
        NpgsqlCommand command = connection.CreateCommand();
        command.CommandText = "INSERT INTO users (name) VALUES (@playerName)";
        command.Parameters.AddWithValue("@playerName", playerModel.realName);
        command.ExecuteNonQuery();

        // Get the inserted identifier LastInsertedId
        playerId = (int)command.LastInsertedId;

        command.Parameters.AddWithValue("@playerId", playerId);
    }
    catch (Exception ex)
    {
        //
    }
}

Answer 1

command.CommandText = "INSERT INTO users (name) VALUES (@playerName) RETURNING id";
playerId = (int)command.ExecuteScalar();